From: Rob Kaufman <rgkaufman@...>
Date: 2007-07-25T02:02:45+09:00
Subject: Re: rubyQT

Hi Carl,

  Assuming that the problem your having is that you type and not text
shows up, I was not able to reproduce the issue.  I did have to make
the following changes to get your code to run at all:

------
my_widget.rb
-------

class MyWidget < Qt::Widget
 slots 'go()'
 def initialize(parent = nil)
   super(parent)
   setFixedSize(500, 500)
   @textedit = Qt::TextEdit.new(self)
   @textedit.setGeometry(5, 50, 480, 300)

   quit = Qt::PushButton.new(('Generate'), self)
   quit.setGeometry(5, 5, 100, 30)
   quit.setFont(Qt::Font.new('Arial', 12, Qt::Font::Bold))
   connect(quit, SIGNAL(:clicked)) {@textedit.clear();  go() }
 end

 def go
     #   @textedit.clear()
     @textedit.setText("Generating files:-")
     count = 0
     50.times do
       count+=1
       sleep 0.1
       @textedit.append("Generating file: "+count.to_s)
       puts "hello"
     end
     @textedit.append("Done")
 end
end
if $0 == __FILE__
    a = Qt::Application.new(ARGV)
    w = MyWidget.new
    a.mainWidget = w # **IMPORTANT ADDITION**
    w.show
    a.exec
end


  You'll notice that I'm only using one file (my_widget.rb) instead of
the two file structure you had before.  The main.rb would work like
this:

------
main.rb
-------

require 'my_widget'
a = Qt::Application.new(ARGV)
w = MyWidget.new
a.mainWidget = w
w.show
a.exec

'exec'ing in multiple places, instantiating more than one instance of
Qt::Application and not adding the main widget to the application
instance are all issues I saw in your code that are fixed in the
above.

Hope That Helps,
Rob Kaufman
On 7/24/07, Carl Bourne <carl.bourne@intellect.co.uk> wrote:
> Hi,
>
> I wonder if you can help. I'm currently exploring rubyqt in conjunction
> with the latest QT4 libraries. However, I can't seem to get a TextEdit
> widget to refresh properly. My code runs correctly when I click the
> button that has a ruby function assigned to it, but the TextEdit field
> does not update until the ruby function completes.
>
> Here's the code I'm using:-
>
>
> --------------------------------------------------------------------------------------------------
> main.rb
> ----------
> require 'Qt'
> require 'dialog.rb'
> app = Qt::Application.new(ARGV)
> dialog = Dialog.new
> dialog.exec
>
> ------
> dialog.rb
> -------
>
> class MyWidget < Qt::Widget
>   slots 'go()'
>   def initialize(parent = nil)
>     super(parent)
>     setFixedSize(500, 500)
>     @textedit = Qt::TextEdit.new(self)
>     @textedit.setGeometry(5, 50, 480, 300)
>
>     quit = Qt::PushButton.new(('Generate'), self)
>     quit.setGeometry(5, 5, 100, 30)
>     quit.setFont(Qt::Font.new('Arial', 12, Qt::Font::Bold))
>     connect(quit, SIGNAL(:clicked)) {@textedit.clear();  go() }
>   end
>
>   def go
>       #   @textedit.clear()
>       @textedit.setText("Generating files:-")
>       count = 0
>       50.times do
>         count+=1
>         sleep 0.1
>         @textedit.append("Generating file: "+count.to_s)
>         puts "hello"
>       end
>       @textedit.append("Done")
>   end
> end
> app = Qt::Application.new(ARGV)
> widget = MyWidget.new()
> widget.show()
> app.exec()
>
> -------------------------------------------------------------------------------------------------
> --
> Posted via http://www.ruby-forum.com/.
>
>